1100000120021 has 48 divisors (see below), whose sum is σ = 1348207249920. Its totient is φ = 887404896000.

The previous prime is 1100000120003. The next prime is 1100000120111. The reversal of 1100000120021 is 1200210000011.

It is not a de Polignac number, because 1100000120021 - 2⁶ = 1100000119957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100000119990 and 1100000120008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100000120221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12701456 + ... + 12787766.

It is an arithmetic number, because the mean of its divisors is an integer number (28087651040).

Almost surely, 2^{1100000120021} is an apocalyptic number.

1100000120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100000120021 is a deficient number, since it is larger than the sum of its proper divisors (248207129899).

1100000120021 is a wasteful number, since it uses less digits than its factorization.

1100000120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86586 (or 86569 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1100000120021 its reverse (1200210000011), we get a palindrome (2300210120032).

The spelling of 1100000120021 in words is "one trillion, one hundred billion, one hundred twenty thousand, twenty-one".